Mercurial > urweb
view demo/list.ur @ 1272:56bd4a4f6e66
Some serious bug-fix work to get HTML example to compile; this includes fixing a bug with 'val' patterns in Unnest and the need for more local reduction in Especialize
author | Adam Chlipala <adamc@hcoop.net> |
---|---|
date | Thu, 03 Jun 2010 13:04:37 -0400 |
parents | 669ac5e9a69e |
children |
line wrap: on
line source
datatype list t = Nil | Cons of t * list t fun length [t] (ls : list t) = let fun length' (ls : list t) (acc : int) = case ls of Nil => acc | Cons (_, ls') => length' ls' (acc + 1) in length' ls 0 end fun rev [t] (ls : list t) = let fun rev' (ls : list t) (acc : list t) = case ls of Nil => acc | Cons (x, ls') => rev' ls' (Cons (x, acc)) in rev' ls Nil end